SOA and ESB. Mark Jeynes IBM Software, Asia Pacific

Transcription

1 SOA and ESB Mark Jeynes IBM Software, Asia Pacific

2 Agenda Service Orientation SCA / SDO Process Choreography WS-BPEL Enterprise Service Bus Demonstration WebSphere Integration Developer WebSphere Process Server (and ESB)

3 SCA Service Component Architecture Dependency Injection Version 1.0, March 2007 Led by IBM through osoa.org Broad vendor support Platform and Programming Language Independent Reference Implementations Apache Tuscany Standards Managed by OASIS oasis-opencsa.org/specifications 0.9 shipped with WebSphere Process Server 6.0 Also WebSphere Application Server 7.0 Feature Pack for SCA

4 Service Component Architecture

5 SCA - Services public interface ServiceImplSync { } public Object invoke(operationtype operationtype, Object input) throws ServiceBusinessException; public interface ServiceImplAsync { public void invoke(operationtype operationtype, Object input, ServiceCallback callback, Ticket ticket); } public interface StockQuote { public float getquote(string symbol) throws InvalidSymbolException; } public interface StockQuoteAsync { public void getquoteasync(string symbol, ServiceCallback callback, } Ticket ticket);

6 SCA - Clients public interface Service { } public Object invoke(string operationname, Object input) throws ServiceBusinessException; public Ticket invokeasync(string operationname, Object input); public Ticket invokeasyncwithcallback(string operationname, Object input); public Object invokeresponse(ticket ticket, long timeout) throws ServiceBusinessException; public interface ServiceCallback { } public void oninvokeresponse(ticket ticket, Object output, Exception exception);

7 SDO Service Data Object At version 2.1, November 2006 Evolved from eclipse.org EMF Same standards body as SCA Compatible with XML Schema Physical Format Independent Static and Dynamic API Support for disconnected data pattern

8 SDO API DataGraph graph = db.executequery( select * from customer ); DataObject root = graph.getrootobject(); // use xpath to get the name of the first customer String firstcustname = root.getstring( customer[0]/name ); // iterate through all customers (dynamic API) Iterator iter = root.getlist( customer ).iterator(); while (iter.hasnext()) { DataObject dataobject = (DataObject) iter.next(); String custname = dataobject.getstring( name ); } // iterate through all customers (type safe API) Iterator iter = root.getlist( customer ).iterator(); while (iter.hasnext()) { Customer customer = (Customer) iter.next(); String custname = customer.getname(); }

9 Disconnected Data <sdo:datagraph xmlns:sdo="commonj.sdo"> <changesummary> <sim:simple_customer sdo:ref="#/sdo:datagraph/sim:simple_customer" xmlns:sim="ld:logical/simplecustomer"> <CUSTOMER_SINCE> T00:00:00</CUSTOMER_SINCE> </sim:simple_customer> </changesummary> <sim:simple_customer xmlns:sim="ld:logical/simplecustomer"> <CUSTOMER_ID>CUSTOMER7</CUSTOMER_ID> <CUSTOMER_SINCE> T00:00:00</CUSTOMER_SINCE> </sim:simple_customer> </sdo:datagraph>

10 WS-BPEL Business Process Execution Language WS-BPEL 2.0, April 2007 Evolved from BPEL4WS 1.1 May 2003 Managed by oasis-open.org Designed for interoperability via WSDL XPath (optional) Sequential Processing Construct Activities; Basic and Structured Protocol Neutral No formal details for runtime QoS Related Standards BPMN, XPDL

11 WS-BPEL - Activities

12 WS-BPEL - PartnerLinks

13 Scopes, Faults, Compensation

14 ESB Enterprise Service Bus Common architectural pattern used in Integration solutions Origin in Messaging Middleware, e.g. WebSphere Message Broker WebSphere ESB WebSphere Datapower Flow composition based on primitives e.g. XSLT, Map, Java, Property Setters Protocol Management Tier Manage Interaction Patterns Type Conversion Physical Format Transport Protocol

15 Counting the Cost of SOA Transport SSL Parse headers Decrypt headers Encrypt Headers Parse headers Transport SSL Encrypt / Decrypt body and headers Listener Routing Mediation Audit Mediation Invoker Encrypt / Decrypt body and headers Parse body and headers Service Consumer Cache Routing table XML Transform Mediation Decrypt Body Transform Body Service Provider Parse body and headers Transport SSL Transport SSL Responder Routing Mediation Audit Mediation Listener Transport SSL Parse headers Encrypt headers Decrypt headers Parse headers Transport SSL

16 Demonstration WebSphere Integration Developer To Demonstrate and Discuss SCA Solution Assembly SCA Export / Import Bindings QoS Options (SCA & BPEL) WS-AtomicTransaction in 2PC

17 Summary We have covered Programming Models SCA / SDO WS-BPEL ESB Demonstration of WebSphere Integration Developer for WebSphere Process Server and WebSphere ESB

18 Questions?

19 References WS-BPEL Specification, version 2.0, OASIS Service Component Architecture (SCA), OASIS Apache Tuscany IBM developerworks, SOA and Web Services Business Process Modeling Notation (BPMN), version 1.2, OMG XML Process Definition Language (XPDL), version 2.1, WfMC

20 Backup